Every public data breach

Disclosed this week44On record26,355

44 disclosed this week · 26,355 on record

T-Mobile

4 breaches91M affected in allTelecomt-mobile.com

Breach, details not statedBreach notice filed with the Indiana AG, details not stated.2 affectedTelecomUSAug 29, 2025Abused API leaks account data of 37 million T-Mobile customersHacking exposed names, addresses, emails, phone numbers and dates of birth. Reported to the Indiana AG.Hacking37M affectedTelecomUSJan 19, 2023Cyberattack steals data of tens of millions of T-Mobile customers and applicantsHacking exposed names, government IDs, source code, internal documents, dates of birth, Social Security numbers and phone numbers. Reported to the Delaware DOJ.Hacking54M affectedTelecomUSOct 9, 2020Breach, details not statedExposed names, Social Security numbers, government IDs, addresses and names. Reported to the Maine AG.TelecomUSDec 31, 2013
About

Every breach here links to its sources and official notices. Across Glyph: lawsuits, incidents and outages.

Added2026-09-25
T-Mobile, 2013-12-31
source2026-09-25
T-Mobile, 2020-10-09https://www.in.gov/attorneygeneral/consumer-protection-division/id-theft-prevention/files/DB-Year-to-Date-Report-2020.pdf
disclosed2026-09-25
T-Mobile, 2020-10-092020-10-09
disclosed2026-09-25
T-Mobile, 2020-10-092021-02-09
occurred2026-09-25
T-Mobile, 2023-01-192023-02-24
Added2026-09-25
T-Mobile, 2025-08-29
status2026-09-25
T-Mobile, 2020-10-09settled
fine_usd2026-09-25
T-Mobile, 2020-10-09350000000
lawsuit2026-09-25
T-Mobile, 2020-10-09$350M class action settlement plus $150M security spending commitment (2022)
data_types2026-09-25
T-Mobile, 2020-10-09["names","government-id","source-code","internal-docs","dob","ssn","phone"]
disclosed2026-09-25
T-Mobile, 2020-10-092021-08-18
summary2026-09-25
T-Mobile, 2020-10-09T-Mobile said stolen files held data on about 7.8 million current postpaid accounts and just over 40 million former or prospective customers, including names, birth dates, Social Security numbers and driver's license details.
title2026-09-25
T-Mobile, 2020-10-09Cyberattack steals data of tens of millions of T-Mobile customers and applicants
attack2026-09-25
T-Mobile, 2020-10-09hacking
data_types2026-09-25
T-Mobile, 2020-10-09["names","government-id","source-code","internal-docs"]
summary2026-09-25
T-Mobile, 2020-10-09T-Mobile said a bad actor used stolen credentials to access internal systems housing operational tools software, and that the intrusion was quickly shut down. KrebsOnSecurity reported the Lapsus$ group stole source code for a range of T-Mob
title2026-09-25
T-Mobile, 2020-10-09Lapsus$ uses stolen credentials to access T-Mobile internal tools and source code
Added2026-09-25
T-Mobile, 2023-01-19
domain2026-09-25
T-Mobilet-mobile.com
Added2026-09-25
T-Mobile, 2020-10-09
Added2026-09-25
T-Mobile